title: Coherent time-stretch transformation for real-time capture of wideband signals.
abstract: Time stretch transformation of wideband waveforms boosts the performance of analog-to-digital converters and digital signal processors by slowing down analog electrical signals before digitization. The transform is based on dispersive Fourier transformation implemented in the optical domain. A coherent receiver would be ideal for capturing the time-stretched optical signal. Coherent receivers offer improved sensitivity, allow for digital cancellation of dispersion-induced impairments and optical nonlinearities, and enable decoding of phase-modulated optical data formats. Because time-stretch uses a chirped broadband (>1 THz) optical carrier, a new coherent detection technique is required. In this paper, we introduce and demonstrate coherent time stretch transformation; a technique that combines dispersive Fourier transform with optically broadband coherent detection.
authors.forename: Brandon W
authors.initials: BW
authors.lastname: Buckley
authors.forename: Asad M
authors.initials: AM
authors.lastname: Madni
authors.forename: Bahram
authors.initials: B
authors.lastname: Jalali